LIBERAL, Kansas — The Department of Agriculture’s Food Safety and Inspection Services announced Wednesday night that National Beef Packing Company is recalling approximately 50,100 pounds of ground beef products that may be contaminated with E. coli.

FSIS and the company have not received any reports of illnesses associated with the recalled beef.

The problem was discovered through routine FSIS monitoring, which confirmed a positive result for E. coli. An investigation determined National Beef Packing Company was the sole supplier of the source materials used in the test.

All these products bear the establishment number “EST. 208A” inside the USDA mark of inspection.

The products were produced on July 18, 2013, and were shipped in 40 to 60 pounds cases to retailers, wholesalers, and food service distributors nationwide.